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Full text of "The Cambridge Natural History"

GREVY'S ZEBRA

animal than the Horse. Mr. Tegetmeier calls attention to j
donkey living in 1893 which had been ridden fifty-five year;
previously. The Horse, on the other hand, lives not much more
than twenty-five years.
A second species of African Wild Ass, IE, somalicus,1 is distin-
guished by its greyer colour, by the absence of the shoulder stripe
by the very faint development of the dorsal stripe, and by th*
presence of numerous cross stripes upon the legs. It has, too
smaller ears, and a longer and more flowing mane. Mr. Lori
Phillips, an experienced naturalist and traveller, saw a herd oi
these Wild Asses in Somaliland, which he regarded as being oi
quite a new species. A living example in the Zoological Society's
Gardens led Mr. Sclater to an identical conclusion, which was
supported, as he pointed out, by the fact that this Ass has a
different range to the African or Nubian Wild Ass.
Of the Zebras three species are usually allowed; these are JB.
zebra, the " Mountain " or " Common " Zebra, E. fawehelli, JE. grevyi,
as well as E. quagga. Professor Ewart thinks that the Common
.Zebra, BurchelTs, and the Quagga are not very distinctly marked
off from each other. No one, however, has any doubt of the
distinctness of JB. grevyi. This latter differs from the rest in its
larger size, in the large head and ears, and in the marked hairiness
of the ears. It would seem to be a primitive type of Zebra, if
the fact that the occasional reversion of hybrids to a parent
form be allowed; for Professor Ewart found a cross-bred Zebra to
present several characteristics in the face-marking of this, the
finest of the Zebra tribe. Only four specimens of JK grewyi have
been exhibited alive in Europe—two in Paris, and two in the
Zoological Society's Gardens in London. The latter were presented
to Queen. Victoria by King Menelek of Abyssinia. The species was
named by Professor A. Milne-Edwards in honour of a late President
of the French Republic, from an example also sent by King
Menelek.
The Common Zebra has closer and darker stripes than Bur-
eheH's, but not quite so close as in M. grevyi. It has also a very
characteristic arrangement of stripes on the withers in the form
of a gxidbxm. This latter is wanting in both the other species.
In M. ffr&m/i, in fact, this part of the back is white. & zebra
•>b«8 also a qbwlap in front. JB. lurchelli has fewer and broader
1 JVoc. Zwl. Soe. 1884, p. 540.